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Class Information
Number: 175/267
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by fluid pressure
Description: Apparatus in which the laterally movable cutter element is moved laterally by means of a fluid under pressure acting against the cutter element or a below ground part attached thereto.










Sub-classes under this class:

Class Number Class Name Patents
175/269 Fluid pressure acts against spring biased part 93
175/268 With dropped element 19


Patents under this class:
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Patent Number Title Of Patent Date Issued
8640794 Pressurized fluid flow system for a normal circulation hammer and hammer thereof Feb. 4, 2014
8608411 Device for consolidating soils by means of mechanical mixing and injection of consolidating fluids Dec. 17, 2013
8550188 Downhole reamer asymmetric cutting structures Oct. 8, 2013
8485282 Earth-boring tools having expandable cutting structures and methods of using such earth-boring tools Jul. 16, 2013
8443875 Down hole tool with adjustable fluid viscosity May. 21, 2013
8371400 Downhole tool actuation Feb. 12, 2013
8365842 Ratchet mechanism in a fluid actuated device Feb. 5, 2013
8327954 Optimized reaming system based upon weight on tool Dec. 11, 2012
8276690 Expandable downhole tool Oct. 2, 2012
8230951 Earth-boring tools having expandable members and methods of making and using such earth-boring tools Jul. 31, 2012
8141657 Steerable rotary directional drilling tool for drilling boreholes Mar. 27, 2012
8104549 Activating device for a downhole tool Jan. 31, 2012
8028763 Downhole tool Oct. 4, 2011
7997343 Dynamic scale removal tool and method of removing scale using the tool Aug. 16, 2011
7891441 Expandable downhole tool Feb. 22, 2011
7849936 Steerable rotary directional drilling tool for drilling boreholes Dec. 14, 2010
7836975 Morphable bit Nov. 23, 2010
7757787 Drilling and hole enlargement device Jul. 20, 2010
7699120 On demand actuation system Apr. 20, 2010
7681666 Expandable reamer for subterranean boreholes and methods of use Mar. 23, 2010
7650951 Resettable actuator for downhole tool Jan. 26, 2010
7506703 Drilling and hole enlargement device Mar. 24, 2009
7467671 Drill bit with protection member Dec. 23, 2008
7383900 Drill bit and system for drilling a borehole Jun. 10, 2008
7293616 Expandable bit Nov. 13, 2007
7182157 Enlarging well bores having tubing therein Feb. 27, 2007
7090038 Bedrock drilling and excavating apparatus Aug. 15, 2006
6991046 Expandable eccentric reamer and method of use in drilling Jan. 31, 2006
6973978 Drilling tool having an expandable bladder and method for using same Dec. 13, 2005
6959774 Drilling apparatus Nov. 1, 2005
6953096 Expandable bit with secondary release device Oct. 11, 2005
6929076 Bore hole underreamer having extendible cutting arms Aug. 16, 2005
6851491 Internal pressure indicator and locking mechanism for a downhole tool Feb. 8, 2005
6732817 Expandable underreamer/stabilizer May. 11, 2004
6679328 Reverse section milling method and apparatus Jan. 20, 2004
6668949 Underreamer and method of use Dec. 30, 2003
6615933 Downhole tool with extendable members Sep. 9, 2003
6595302 Multi-blade underreamer Jul. 22, 2003
6402432 Method for installing load bearing piles utilizing a tool with blade means Jun. 11, 2002
6217260 Downhole reamer with double acting dual piston cylinder Apr. 17, 2001
6041874 Tubular actuator component for use in a drill string Mar. 28, 2000
5971085 Downhole unit for use in boreholes in a subsurface formation Oct. 26, 1999
5853054 2-Stage underreamer Dec. 29, 1998
5808052 Use of cellulose mixed ethers as additives for earth pressure shields Sep. 15, 1998
5472057 Drilling with casing and retrievable bit-motor assembly Dec. 5, 1995
5385205 Dual mode rotary cutting tool Jan. 31, 1995
5368114 Under-reaming tool for boreholes Nov. 29, 1994
5271472 Drilling with casing and retrievable drill bit Dec. 21, 1993
5255741 Process and apparatus for completing a well in an unconsolidated formation Oct. 26, 1993
5253708 Process and apparatus for performing gravel-packed liner completions in unconsolidated formations Oct. 19, 1993

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